Deflecting coils

ABSTRACT

A deflecting coil in which, instead of winding a coil on a core, conductive wires are directly provided on a sheet of insulating material and the sheet is combined with the core or both the sheet of insulating material and the conductive wires are directly provided on the surface of the core, and which, therefore, is adapted to mass production possessing uniform characteristic.

United States Patent Tsutsumi [4 1 Jan. 25, 1972 [54] DEFLECTING COILS[56] References Cited 72] Inventor: Takashi Tsutsumi, Suita, JapanUNITED STATES PATENTS 731 Assignee: Matsushita Electric Industrial Co.m, 3,007,087 l0/l96l Corpew ..335 213 Osaka, Japan 3,094,649 6/1963Marley ..335/2l3 [22] Filed: June 15, 1970 Appl. No.: 46,241

Foreign Application Priority Data Primary ExaminerG. HarrisAttorney-Stevens, Davis, Miller & Mosher 57] ABSTRACT productionpossessing uniform 4 Claims, 3 Drawing Figures PATENTEDJANZSIQTZ3.838.152

INVENTOR TAKASHI TSUTSUMI ATTORNEYS DEFLECTING COILS The presentinvention relates to a deflecting coil to be fitted around the neck of apicture tube of a television receiver.

In the past, a deflecting coil of the type described has beenmanufactured by continuously winding a coil for vertical deflection anda coil for horizontal deflection around a ferrite core. Namely,a coilwire is provided beforehand and said coil wire is wound on the core in apredetermined state of distribution while unwinding the same. Such apractice has made the production technique complicated since theposition of the coil wire must be regulated in the process of windingthe core wire on the core. In addition, with such prior art deflectingcoils it has occasionally been impossible to obtain a desireddistribution of magnetic field due to displacement of the coil wireafter manufacture of the coil.

In view of the above, the present invention proposes a deflecting coilwhich is constructed by covering a core with insulating plates having agroup of coil wires previously formed thereon or by forming a coil onthe surface of a core by plating or vacuum evaporation, and, which,therefore, can be produced easily at high yield and is rigid and easy tomaintain.

The object of the present invention is to provide a deflecting coilcomprising a core and an insulating overlay having conductive wiresdirectly secured thereon by vacuum evaporation, printing or plating andoverlying said core in firm contact therewith.

The present invention will be described by way of example hereinafterwith reference to the accompanying drawings, in which:

FIG. I is a perspective view of one embodiment of the deflecting coilaccording to the present invention;

FIG. 2 is a perspective view of another embodiment of the deflectingcoil of this invention; and

FIG. 3 is a front elevation, partially in section, of the deflectingcoil shown in FIG. 2.

The deflecting coil shown in FIG. 1 is of the type which is constructedby only composing a coil element at first and then combining the coilelement with a core. In FIG. 1, reference numeral 1 designates a ferritecore which is sandwiched between insulating overlays 2, 3 each having acoil formed thereon. The insulating overlays 2, 3 overlying on the outerand inner surfaces of the core 1 each consist of a thin sheet ofinsulating material subjected to a conducting treatment, with conductivewires formed thereon by photoetching, electrolytic plating or printing.Describing more practically, a sheet of insulating material, such asbakelite, is provided at the opposite ends thereof with terminals 4, 4with a predetermined interval between each other and coil wires 5 arefixedly provided on the surface of the sheet in such a manner that eachof the coil wires is connected to the opposed terminals 4, 4' at itsopposite ends. Thereafter, the sheet is shaped into a cylindrical shapeto be fitted in or on the core I. The insulating overlays 2, 3 thusproduced are mounted on the inner and outer surfaces of the ring core 1respectively and the opposed terminals 4 at the same ends of the innerand outer overlays are connected with each other and similarly theopposed terminals 4 at the other ends of the same are connected witheach other, whereby the same efiect as obtainable from a series of coilwires wound around the ring core 1 can be obtained.

Although in the embodiment described above the coil is formed bymounting the conductive wire-carrying insulating overlays on the innerand outer surfaces of the ring core and connecting the terminal ends ofthe conductive wires with each other at each ends of said insulatingoverlays, it is to be understood that the coil may be formed by makingthe insulating overlays of a flexible material and connecting theterminal ends of the conductive wires on the respective overlays witheach other by flexing the end of one overlay into a U-shape around theedge of the core.

FIG. 2 shows another embodiment of the present invention. In FIG. 2,reference numeral 7 designates conductive wires formed on an insulatinglayer secured to a cylindrical core. These conductive wires 7 correspondto the 60!] wire of the conventional deflecting coil, and are formed inthe following manner: Namely, the insulating layer 8 is formed on thesurface of the core by vacuumevaporation and then the conductive wires 7are formed on top of said insulating layer 8 with a suitable intervalbetween each other by vacuum evaporation. Thereafter, the insulatinglayer and the conductive wire layer are formed alternately one onanother in similar manner and then the rear ends of the conductive wiresare connected with each other to form a deflecting coil.

In case of a deflecting coil of multiplex winding, it may be formed, asshown in FIG. 3, by laminating a plurality of insulating overlays 8 eachhaving conductive wires 7' provided thereon, on a core 6' and connectingthe rear ends of the conductive wires with each other so as to form acoil or by forming an insulating layer and a conductive wire layeralternately on the surface of a core by vacuum evaporation, plating,etc.

I claim:

1. A deflecting coil comprising a cylindrical core and insulatingoverlays provided on both the inner and outer surfaces of said core,said overlays having a plurality of conductive wires directly formedthereon in firm contact therewith, each of said wires being ofsubstantially the same length as said core and having open end portions,each inner wire and its associated outer wire being connected with eachother at the respective end portions thereof.

2. A deflecting coil comprising a cylindrical core and insulating layersformed on both the inner and outer surfaces of said core, said layershaving a plurality of conductive wires directly formed thereon in firmcontact therewith, each of said wires being of substantially the samelength as said core and having open end portions, each inner wire andits associated outer wire being connected with each other at therespective end portions thereof.

3. A deflecting coil as defined in claim 1, wherein a plurality of saidinsulating overlays each having conductive wires directly securedthereon are laminated and said conductive wires are connected with eachother at the ends of the insulating overlays to form a coil.

4. A deflecting coil as defined in claim 2, wherein a plurality of saidinsulating layers each having conductive wires provided thereon aresuperposed on top of another and said conductive wires of the respectivelayers are connected with each other at the ends of said layers to forma coil.

1. A deflecting coil comprising a cylindrical core and insulatingoverlays provided on both the inner and outer surfaces of said core,said overlays having a plurality of conductive wires directly formedthereon in firm contact therewith, each of said wires being ofsubstantially the same length as said core and having open end portions,each inner wire and its associated outer wire being connected with eachother at the respective end portions thereof.
 2. A deflecting coilcomprising a cylindrical core and insulating layers formed on both theinner and outer surfaces of said core, said layers having a plurality ofconductive wires directly formed thereon in firm contact therewith, eachof said wires being of substantially the same length as said core andhaving open end portions, each inner wire and its associated outer wirebeing connected with each other at the respective end portions thereof.3. A deflecting coil as defined in claim 1, wherein a plurality of saidinsulating overlays each having conductive wires directly securedthereon are laminated and said conductive wires are connected with eachother at the ends of the insulating overlays to form a coil.
 4. Adeflecting coil as defined in claim 2, wherein a plurality of saidinsulating layers each having conductive wires provided thereon aresuperposed on top of another and said conductive wires of the respectivelayers are connected with each other at the ends of said layers to forma coil.